/* Target-dependent code for GNU/Linux, architecture independent.
- Copyright (C) 2009-2020 Free Software Foundation, Inc.
+ Copyright (C) 2009-2021 Free Software Foundation, Inc.
This file is part of GDB.
static struct gdbarch_data *linux_gdbarch_data_handle;
struct linux_gdbarch_data
- {
- struct type *siginfo_type;
- };
+{
+ struct type *siginfo_type;
+ int num_disp_step_buffers;
+};
static void *
-init_linux_gdbarch_data (struct gdbarch *gdbarch)
+init_linux_gdbarch_data (struct obstack *obstack)
{
- return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct linux_gdbarch_data);
+ return obstack_zalloc<linux_gdbarch_data> (obstack);
}
static struct linux_gdbarch_data *
yet. Positive if we tried looking it up, and found it. Negative
if we tried looking it up but failed. */
int vsyscall_range_p = 0;
+
+ /* Inferior's displaced step buffers. */
+ gdb::optional<displaced_step_buffers> disp_step_bufs;
};
/* Per-inferior data key. */
valid INFO pointer. */
static struct linux_info *
-get_linux_inferior_data (void)
+get_linux_inferior_data (inferior *inf)
{
- struct linux_info *info;
- struct inferior *inf = current_inferior ();
+ linux_info *info = linux_inferior_data.get (inf);
- info = linux_inferior_data.get (inf);
- if (info == NULL)
+ if (info == nullptr)
info = linux_inferior_data.emplace (inf);
return info;
/* sival_t */
sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
- TYPE_NAME (sigval_type) = xstrdup ("sigval_t");
+ sigval_type->set_name (xstrdup ("sigval_t"));
append_composite_type_field (sigval_type, "sival_int", int_type);
append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type);
pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
TYPE_LENGTH (int_type) * TARGET_CHAR_BIT, "__pid_t");
TYPE_TARGET_TYPE (pid_type) = int_type;
- TYPE_TARGET_STUB (pid_type) = 1;
+ pid_type->set_target_is_stub (true);
/* __uid_t */
uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
TYPE_LENGTH (uint_type) * TARGET_CHAR_BIT, "__uid_t");
TYPE_TARGET_TYPE (uid_type) = uint_type;
- TYPE_TARGET_STUB (uid_type) = 1;
+ uid_type->set_target_is_stub (true);
/* __clock_t */
clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
TYPE_LENGTH (long_type) * TARGET_CHAR_BIT,
"__clock_t");
TYPE_TARGET_TYPE (clock_type) = long_type;
- TYPE_TARGET_STUB (clock_type) = 1;
+ clock_type->set_target_is_stub (true);
/* _sifields */
sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
/* struct siginfo */
siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
- TYPE_NAME (siginfo_type) = xstrdup ("siginfo");
+ siginfo_type->set_name (xstrdup ("siginfo"));
append_composite_type_field (siginfo_type, "si_signo", int_type);
append_composite_type_field (siginfo_type, "si_errno", int_type);
append_composite_type_field (siginfo_type, "si_code", int_type);
ULONGEST *addr, ULONGEST *endaddr,
const char **permissions, size_t *permissions_len,
ULONGEST *offset,
- const char **device, size_t *device_len,
+ const char **device, size_t *device_len,
ULONGEST *inode,
const char **filename)
{
if (!dump_p && private_p && offset == 0
&& (filterflags & COREFILTER_ELF_HEADERS) != 0)
{
- /* Let's check if we have an ELF header. */
- gdb::unique_xmalloc_ptr<char> header;
- int errcode;
-
/* Useful define specifying the size of the ELF magical
header. */
#ifndef SELFMAG
#define SELFMAG 4
#endif
- /* Read the first SELFMAG bytes and check if it is ELFMAG. */
- if (target_read_string (addr, &header, SELFMAG, &errcode) == SELFMAG
- && errcode == 0)
+ /* Let's check if we have an ELF header. */
+ gdb_byte h[SELFMAG];
+ if (target_read_memory (addr, h, SELFMAG) == 0)
{
- const char *h = header.get ();
-
/* The EI_MAG* and ELFMAG* constants come from
<elf/common.h>. */
if (h[EI_MAG0] == ELFMAG0 && h[EI_MAG1] == ELFMAG1
return dump_p;
}
+/* As above, but return true only when we should dump the NT_FILE
+ entry. */
+
+static int
+dump_note_entry_p (filter_flags filterflags, const struct smaps_vmflags *v,
+ int maybe_private_p, int mapping_anon_p, int mapping_file_p,
+ const char *filename, ULONGEST addr, ULONGEST offset)
+{
+ /* vDSO and vsyscall mappings will end up in the core file. Don't
+ put them in the NT_FILE note. */
+ if (strcmp ("[vdso]", filename) == 0
+ || strcmp ("[vsyscall]", filename) == 0)
+ return 0;
+
+ /* Otherwise, any other file-based mapping should be placed in the
+ note. */
+ return 1;
+}
+
/* Implement the "info proc" command. */
static void
}
else
{
- if (!target_has_execution)
+ if (!target_has_execution ())
error (_("No current process: you must name one."));
if (current_inferior ()->fake_pid_p)
error (_("Can't determine the current process's PID: you must name one."));
"Start Addr",
" End Addr",
" Size", " Offset", "objfile");
- }
+ }
else
- {
+ {
printf_filtered (" %18s %18s %10s %10s %s\n",
"Start Addr",
" End Addr",
&inode, &mapping_filename);
if (gdbarch_addr_bit (gdbarch) == 32)
- {
- printf_filtered ("\t%10s %10s %10s %10s %s\n",
+ {
+ printf_filtered ("\t%10s %10s %10s %10s %s\n",
paddress (gdbarch, addr),
paddress (gdbarch, endaddr),
hex_string (endaddr - addr),
*mapping_filename ? mapping_filename : "");
}
else
- {
- printf_filtered (" %18s %18s %10s %10s %s\n",
+ {
+ printf_filtered (" %18s %18s %10s %10s %s\n",
paddress (gdbarch, addr),
paddress (gdbarch, endaddr),
hex_string (endaddr - addr),
hex_string (offset),
*mapping_filename ? mapping_filename : "");
- }
+ }
}
}
else
}
}
-/* Implement "info proc mappings" for a corefile. */
+/* Implementation of `gdbarch_read_core_file_mappings', as defined in
+ gdbarch.h.
+
+ This function reads the NT_FILE note (which BFD turns into the
+ section ".note.linuxcore.file"). The format of this note / section
+ is described as follows in the Linux kernel sources in
+ fs/binfmt_elf.c:
+
+ long count -- how many files are mapped
+ long page_size -- units for file_ofs
+ array of [COUNT] elements of
+ long start
+ long end
+ long file_ofs
+ followed by COUNT filenames in ASCII: "FILE1" NUL "FILE2" NUL...
+
+ CBFD is the BFD of the core file.
+
+ PRE_LOOP_CB is the callback function to invoke prior to starting
+ the loop which processes individual entries. This callback will
+ only be executed after the note has been examined in enough
+ detail to verify that it's not malformed in some way.
+
+ LOOP_CB is the callback function that will be executed once
+ for each mapping. */
static void
-linux_core_info_proc_mappings (struct gdbarch *gdbarch, const char *args)
+linux_read_core_file_mappings (struct gdbarch *gdbarch,
+ struct bfd *cbfd,
+ gdb::function_view<void (ULONGEST count)>
+ pre_loop_cb,
+ gdb::function_view<void (int num,
+ ULONGEST start,
+ ULONGEST end,
+ ULONGEST file_ofs,
+ const char *filename)>
+ loop_cb)
{
- asection *section;
- ULONGEST count, page_size;
- unsigned char *descdata, *filenames, *descend;
- size_t note_size;
- unsigned int addr_size_bits, addr_size;
- struct gdbarch *core_gdbarch = gdbarch_from_bfd (core_bfd);
- /* We assume this for reading 64-bit core files. */
+ /* Ensure that ULONGEST is big enough for reading 64-bit core files. */
gdb_static_assert (sizeof (ULONGEST) >= 8);
- section = bfd_get_section_by_name (core_bfd, ".note.linuxcore.file");
- if (section == NULL)
- {
- warning (_("unable to find mappings in core file"));
- return;
- }
+ /* It's not required that the NT_FILE note exists, so return silently
+ if it's not found. Beyond this point though, we'll complain
+ if problems are found. */
+ asection *section = bfd_get_section_by_name (cbfd, ".note.linuxcore.file");
+ if (section == nullptr)
+ return;
- addr_size_bits = gdbarch_addr_bit (core_gdbarch);
- addr_size = addr_size_bits / 8;
- note_size = bfd_section_size (section);
+ unsigned int addr_size_bits = gdbarch_addr_bit (gdbarch);
+ unsigned int addr_size = addr_size_bits / 8;
+ size_t note_size = bfd_section_size (section);
if (note_size < 2 * addr_size)
- error (_("malformed core note - too short for header"));
+ {
+ warning (_("malformed core note - too short for header"));
+ return;
+ }
- gdb::def_vector<unsigned char> contents (note_size);
+ gdb::def_vector<gdb_byte> contents (note_size);
if (!bfd_get_section_contents (core_bfd, section, contents.data (),
0, note_size))
- error (_("could not get core note contents"));
+ {
+ warning (_("could not get core note contents"));
+ return;
+ }
- descdata = contents.data ();
- descend = descdata + note_size;
+ gdb_byte *descdata = contents.data ();
+ char *descend = (char *) descdata + note_size;
if (descdata[note_size - 1] != '\0')
- error (_("malformed note - does not end with \\0"));
+ {
+ warning (_("malformed note - does not end with \\0"));
+ return;
+ }
- count = bfd_get (addr_size_bits, core_bfd, descdata);
+ ULONGEST count = bfd_get (addr_size_bits, core_bfd, descdata);
descdata += addr_size;
- page_size = bfd_get (addr_size_bits, core_bfd, descdata);
+ ULONGEST page_size = bfd_get (addr_size_bits, core_bfd, descdata);
descdata += addr_size;
if (note_size < 2 * addr_size + count * 3 * addr_size)
- error (_("malformed note - too short for supplied file count"));
-
- printf_filtered (_("Mapped address spaces:\n\n"));
- if (gdbarch_addr_bit (gdbarch) == 32)
- {
- printf_filtered ("\t%10s %10s %10s %10s %s\n",
- "Start Addr",
- " End Addr",
- " Size", " Offset", "objfile");
- }
- else
{
- printf_filtered (" %18s %18s %10s %10s %s\n",
- "Start Addr",
- " End Addr",
- " Size", " Offset", "objfile");
+ warning (_("malformed note - too short for supplied file count"));
+ return;
}
- filenames = descdata + count * 3 * addr_size;
- while (--count > 0)
+ char *filenames = (char *) descdata + count * 3 * addr_size;
+
+ /* Make sure that the correct number of filenames exist. Complain
+ if there aren't enough or are too many. */
+ char *f = filenames;
+ for (int i = 0; i < count; i++)
{
- ULONGEST start, end, file_ofs;
+ if (f >= descend)
+ {
+ warning (_("malformed note - filename area is too small"));
+ return;
+ }
+ f += strnlen (f, descend - f) + 1;
+ }
+ /* Complain, but don't return early if the filename area is too big. */
+ if (f != descend)
+ warning (_("malformed note - filename area is too big"));
- if (filenames == descend)
- error (_("malformed note - filenames end too early"));
+ pre_loop_cb (count);
- start = bfd_get (addr_size_bits, core_bfd, descdata);
+ for (int i = 0; i < count; i++)
+ {
+ ULONGEST start = bfd_get (addr_size_bits, core_bfd, descdata);
descdata += addr_size;
- end = bfd_get (addr_size_bits, core_bfd, descdata);
+ ULONGEST end = bfd_get (addr_size_bits, core_bfd, descdata);
descdata += addr_size;
- file_ofs = bfd_get (addr_size_bits, core_bfd, descdata);
+ ULONGEST file_ofs
+ = bfd_get (addr_size_bits, core_bfd, descdata) * page_size;
descdata += addr_size;
+ char * filename = filenames;
+ filenames += strlen ((char *) filenames) + 1;
- file_ofs *= page_size;
-
- if (gdbarch_addr_bit (gdbarch) == 32)
- printf_filtered ("\t%10s %10s %10s %10s %s\n",
- paddress (gdbarch, start),
- paddress (gdbarch, end),
- hex_string (end - start),
- hex_string (file_ofs),
- filenames);
- else
- printf_filtered (" %18s %18s %10s %10s %s\n",
- paddress (gdbarch, start),
- paddress (gdbarch, end),
- hex_string (end - start),
- hex_string (file_ofs),
- filenames);
-
- filenames += 1 + strlen ((char *) filenames);
+ loop_cb (i, start, end, file_ofs, filename);
}
}
+/* Implement "info proc mappings" for a corefile. */
+
+static void
+linux_core_info_proc_mappings (struct gdbarch *gdbarch, const char *args)
+{
+ linux_read_core_file_mappings (gdbarch, core_bfd,
+ [=] (ULONGEST count)
+ {
+ printf_filtered (_("Mapped address spaces:\n\n"));
+ if (gdbarch_addr_bit (gdbarch) == 32)
+ {
+ printf_filtered ("\t%10s %10s %10s %10s %s\n",
+ "Start Addr",
+ " End Addr",
+ " Size", " Offset", "objfile");
+ }
+ else
+ {
+ printf_filtered (" %18s %18s %10s %10s %s\n",
+ "Start Addr",
+ " End Addr",
+ " Size", " Offset", "objfile");
+ }
+ },
+ [=] (int num, ULONGEST start, ULONGEST end, ULONGEST file_ofs,
+ const char *filename)
+ {
+ if (gdbarch_addr_bit (gdbarch) == 32)
+ printf_filtered ("\t%10s %10s %10s %10s %s\n",
+ paddress (gdbarch, start),
+ paddress (gdbarch, end),
+ hex_string (end - start),
+ hex_string (file_ofs),
+ filename);
+ else
+ printf_filtered (" %18s %18s %10s %10s %s\n",
+ paddress (gdbarch, start),
+ paddress (gdbarch, end),
+ hex_string (end - start),
+ hex_string (file_ofs),
+ filename);
+ });
+}
+
/* Implement "info proc" for a corefile. */
static void
const char *filename,
void *data);
+typedef int linux_dump_mapping_p_ftype (filter_flags filterflags,
+ const struct smaps_vmflags *v,
+ int maybe_private_p,
+ int mapping_anon_p,
+ int mapping_file_p,
+ const char *filename,
+ ULONGEST addr,
+ ULONGEST offset);
+
/* List memory regions in the inferior for a corefile. */
static int
linux_find_memory_regions_full (struct gdbarch *gdbarch,
+ linux_dump_mapping_p_ftype *should_dump_mapping_p,
linux_find_memory_region_ftype *func,
void *obfd)
{
}
if (has_anonymous)
- should_dump_p = dump_mapping_p (filterflags, &v, priv,
- mapping_anon_p, mapping_file_p,
- filename, addr, offset);
+ should_dump_p = should_dump_mapping_p (filterflags, &v, priv,
+ mapping_anon_p,
+ mapping_file_p,
+ filename, addr, offset);
else
{
/* Older Linux kernels did not support the "Anonymous:" counter.
data.obfd = obfd;
return linux_find_memory_regions_full (gdbarch,
+ dump_mapping_p,
linux_find_memory_regions_thunk,
&data);
}
-/* Determine which signal stopped execution. */
-
-static int
-find_signalled_thread (struct thread_info *info, void *data)
-{
- if (info->suspend.stop_signal != GDB_SIGNAL_0
- && info->ptid.pid () == inferior_ptid.pid ())
- return 1;
-
- return 0;
-}
-
/* This is used to pass information from
linux_make_mappings_corefile_notes through
linux_find_memory_regions_full. */
/* Write the file mapping data to the core file, if possible. OBFD is
the output BFD. NOTE_DATA is the current note data, and NOTE_SIZE
- is a pointer to the note size. Returns the new NOTE_DATA and
- updates NOTE_SIZE. */
+ is a pointer to the note size. Updates NOTE_DATA and NOTE_SIZE. */
-static char *
+static void
linux_make_mappings_corefile_notes (struct gdbarch *gdbarch, bfd *obfd,
- char *note_data, int *note_size)
+ gdb::unique_xmalloc_ptr<char> ¬e_data,
+ int *note_size)
{
struct linux_make_mappings_data mapping_data;
struct type *long_type
pack_long (buf, long_type, 1);
obstack_grow (&data_obstack, buf, TYPE_LENGTH (long_type));
- linux_find_memory_regions_full (gdbarch, linux_make_mappings_callback,
+ linux_find_memory_regions_full (gdbarch,
+ dump_note_entry_p,
+ linux_make_mappings_callback,
&mapping_data);
if (mapping_data.file_count != 0)
obstack_grow (&data_obstack, obstack_base (&filename_obstack),
size);
- note_data = elfcore_write_note (obfd, note_data, note_size,
- "CORE", NT_FILE,
- obstack_base (&data_obstack),
- obstack_object_size (&data_obstack));
+ note_data.reset (elfcore_write_note
+ (obfd, note_data.release (),
+ note_size, "CORE", NT_FILE,
+ obstack_base (&data_obstack),
+ obstack_object_size (&data_obstack)));
}
-
- return note_data;
}
/* Structure for passing information from
struct linux_collect_regset_section_cb_data
{
+ linux_collect_regset_section_cb_data (struct gdbarch *gdbarch,
+ const struct regcache *regcache,
+ bfd *obfd,
+ gdb::unique_xmalloc_ptr<char> ¬e_data,
+ int *note_size,
+ unsigned long lwp,
+ gdb_signal stop_signal)
+ : gdbarch (gdbarch), regcache (regcache), obfd (obfd),
+ note_data (note_data), note_size (note_size), lwp (lwp),
+ stop_signal (stop_signal)
+ {}
+
struct gdbarch *gdbarch;
const struct regcache *regcache;
bfd *obfd;
- char *note_data;
+ gdb::unique_xmalloc_ptr<char> ¬e_data;
int *note_size;
unsigned long lwp;
enum gdb_signal stop_signal;
- int abort_iteration;
+ bool abort_iteration = false;
};
/* Callback for iterate_over_regset_sections that records a single
/* PRSTATUS still needs to be treated specially. */
if (strcmp (sect_name, ".reg") == 0)
- data->note_data = (char *) elfcore_write_prstatus
- (data->obfd, data->note_data, data->note_size, data->lwp,
- gdb_signal_to_host (data->stop_signal), buf.data ());
+ data->note_data.reset (elfcore_write_prstatus
+ (data->obfd, data->note_data.release (),
+ data->note_size, data->lwp,
+ gdb_signal_to_host (data->stop_signal),
+ buf.data ()));
else
- data->note_data = (char *) elfcore_write_register_note
- (data->obfd, data->note_data, data->note_size,
- sect_name, buf.data (), collect_size);
+ data->note_data.reset (elfcore_write_register_note
+ (data->obfd, data->note_data.release (),
+ data->note_size, sect_name, buf.data (),
+ collect_size));
if (data->note_data == NULL)
- data->abort_iteration = 1;
+ data->abort_iteration = true;
}
/* Records the thread's register state for the corefile note
section. */
-static char *
+static void
linux_collect_thread_registers (const struct regcache *regcache,
ptid_t ptid, bfd *obfd,
- char *note_data, int *note_size,
+ gdb::unique_xmalloc_ptr<char> ¬e_data,
+ int *note_size,
enum gdb_signal stop_signal)
{
struct gdbarch *gdbarch = regcache->arch ();
- struct linux_collect_regset_section_cb_data data;
-
- data.gdbarch = gdbarch;
- data.regcache = regcache;
- data.obfd = obfd;
- data.note_data = note_data;
- data.note_size = note_size;
- data.stop_signal = stop_signal;
- data.abort_iteration = 0;
/* For remote targets the LWP may not be available, so use the TID. */
- data.lwp = ptid.lwp ();
- if (!data.lwp)
- data.lwp = ptid.tid ();
+ long lwp = ptid.lwp ();
+ if (lwp == 0)
+ lwp = ptid.tid ();
+
+ linux_collect_regset_section_cb_data data (gdbarch, regcache, obfd, note_data,
+ note_size, lwp, stop_signal);
gdbarch_iterate_over_regset_sections (gdbarch,
linux_collect_regset_section_cb,
&data, regcache);
- return data.note_data;
}
/* Fetch the siginfo data for the specified thread, if it exists. If
if (!gdbarch_get_siginfo_type_p (gdbarch))
return gdb::byte_vector ();
- scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
- inferior_ptid = thread->ptid;
+ scoped_restore_current_thread save_current_thread;
+ switch_to_thread (thread);
siginfo_type = gdbarch_get_siginfo_type (gdbarch);
struct linux_corefile_thread_data
{
+ linux_corefile_thread_data (struct gdbarch *gdbarch, bfd *obfd,
+ gdb::unique_xmalloc_ptr<char> ¬e_data,
+ int *note_size, gdb_signal stop_signal)
+ : gdbarch (gdbarch), obfd (obfd), note_data (note_data),
+ note_size (note_size), stop_signal (stop_signal)
+ {}
+
struct gdbarch *gdbarch;
bfd *obfd;
- char *note_data;
+ gdb::unique_xmalloc_ptr<char> ¬e_data;
int *note_size;
enum gdb_signal stop_signal;
};
{
struct regcache *regcache;
- regcache = get_thread_arch_regcache (info->ptid, args->gdbarch);
+ regcache = get_thread_arch_regcache (info->inf->process_target (),
+ info->ptid, args->gdbarch);
target_fetch_registers (regcache, -1);
gdb::byte_vector siginfo_data = linux_get_siginfo_data (info, args->gdbarch);
- args->note_data = linux_collect_thread_registers
- (regcache, info->ptid, args->obfd, args->note_data,
- args->note_size, args->stop_signal);
+ linux_collect_thread_registers (regcache, info->ptid, args->obfd,
+ args->note_data, args->note_size,
+ args->stop_signal);
/* Don't return anything if we got no register information above,
such a core file is useless. */
if (args->note_data != NULL)
- if (!siginfo_data.empty ())
- args->note_data = elfcore_write_note (args->obfd,
- args->note_data,
- args->note_size,
- "CORE", NT_SIGINFO,
- siginfo_data.data (),
- siginfo_data.size ());
+ {
+ if (!siginfo_data.empty ())
+ args->note_data.reset (elfcore_write_note (args->obfd,
+ args->note_data.release (),
+ args->note_size,
+ "CORE", NT_SIGINFO,
+ siginfo_data.data (),
+ siginfo_data.size ()));
+ }
}
/* Fill the PRPSINFO structure with information about the process being
/* Copying the program name. Only the basename matters. */
basename = lbasename (fname.get ());
- strncpy (p->pr_fname, basename, sizeof (p->pr_fname));
+ strncpy (p->pr_fname, basename, sizeof (p->pr_fname) - 1);
p->pr_fname[sizeof (p->pr_fname) - 1] = '\0';
infargs = get_inferior_args ();
if (infargs != NULL)
psargs = psargs + " " + infargs;
- strncpy (p->pr_psargs, psargs.c_str (), sizeof (p->pr_psargs));
+ strncpy (p->pr_psargs, psargs.c_str (), sizeof (p->pr_psargs) - 1);
p->pr_psargs[sizeof (p->pr_psargs) - 1] = '\0';
xsnprintf (filename, sizeof (filename), "/proc/%d/stat", (int) pid);
return 1;
}
+/* Find the signalled thread. In case there's more than one signalled
+ thread, prefer the current thread, if it is signalled. If no
+ thread was signalled, default to the current thread, unless it has
+ exited, in which case return NULL. */
+
+static thread_info *
+find_signalled_thread ()
+{
+ thread_info *curr_thr = inferior_thread ();
+ if (curr_thr->state != THREAD_EXITED
+ && curr_thr->suspend.stop_signal != GDB_SIGNAL_0)
+ return curr_thr;
+
+ for (thread_info *thr : current_inferior ()->non_exited_threads ())
+ if (thr->suspend.stop_signal != GDB_SIGNAL_0)
+ return thr;
+
+ /* Default to the current thread, unless it has exited. */
+ if (curr_thr->state != THREAD_EXITED)
+ return curr_thr;
+
+ return nullptr;
+}
+
/* Build the note section for a corefile, and return it in a malloc
buffer. */
-static char *
+static gdb::unique_xmalloc_ptr<char>
linux_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size)
{
- struct linux_corefile_thread_data thread_args;
struct elf_internal_linux_prpsinfo prpsinfo;
- char *note_data = NULL;
- struct thread_info *curr_thr, *signalled_thr;
+ gdb::unique_xmalloc_ptr<char> note_data;
if (! gdbarch_iterate_over_regset_sections_p (gdbarch))
return NULL;
if (linux_fill_prpsinfo (&prpsinfo))
{
if (gdbarch_ptr_bit (gdbarch) == 64)
- note_data = elfcore_write_linux_prpsinfo64 (obfd,
- note_data, note_size,
- &prpsinfo);
+ note_data.reset (elfcore_write_linux_prpsinfo64 (obfd,
+ note_data.release (),
+ note_size, &prpsinfo));
else
- note_data = elfcore_write_linux_prpsinfo32 (obfd,
- note_data, note_size,
- &prpsinfo);
+ note_data.reset (elfcore_write_linux_prpsinfo32 (obfd,
+ note_data.release (),
+ note_size, &prpsinfo));
}
/* Thread register information. */
}
/* Like the kernel, prefer dumping the signalled thread first.
- "First thread" is what tools use to infer the signalled thread.
- In case there's more than one signalled thread, prefer the
- current thread, if it is signalled. */
- curr_thr = inferior_thread ();
- if (curr_thr->suspend.stop_signal != GDB_SIGNAL_0)
- signalled_thr = curr_thr;
+ "First thread" is what tools use to infer the signalled
+ thread. */
+ thread_info *signalled_thr = find_signalled_thread ();
+ gdb_signal stop_signal;
+ if (signalled_thr != nullptr)
+ stop_signal = signalled_thr->suspend.stop_signal;
else
- {
- signalled_thr = iterate_over_threads (find_signalled_thread, NULL);
- if (signalled_thr == NULL)
- signalled_thr = curr_thr;
- }
+ stop_signal = GDB_SIGNAL_0;
- thread_args.gdbarch = gdbarch;
- thread_args.obfd = obfd;
- thread_args.note_data = note_data;
- thread_args.note_size = note_size;
- thread_args.stop_signal = signalled_thr->suspend.stop_signal;
+ linux_corefile_thread_data thread_args (gdbarch, obfd, note_data, note_size,
+ stop_signal);
- linux_corefile_thread (signalled_thr, &thread_args);
+ if (signalled_thr != nullptr)
+ linux_corefile_thread (signalled_thr, &thread_args);
for (thread_info *thr : current_inferior ()->non_exited_threads ())
{
if (thr == signalled_thr)
linux_corefile_thread (thr, &thread_args);
}
- note_data = thread_args.note_data;
if (!note_data)
return NULL;
target_read_alloc (current_top_target (), TARGET_OBJECT_AUXV, NULL);
if (auxv && !auxv->empty ())
{
- note_data = elfcore_write_note (obfd, note_data, note_size,
- "CORE", NT_AUXV, auxv->data (),
- auxv->size ());
+ note_data.reset (elfcore_write_note (obfd, note_data.release (),
+ note_size, "CORE", NT_AUXV,
+ auxv->data (), auxv->size ()));
if (!note_data)
return NULL;
}
/* File mappings. */
- note_data = linux_make_mappings_corefile_notes (gdbarch, obfd,
- note_data, note_size);
+ linux_make_mappings_corefile_notes (gdbarch, obfd, note_data, note_size);
return note_data;
}
/* It doesn't make sense to access the host's /proc when debugging a
core file. Instead, look for the PT_LOAD segment that matches
the vDSO. */
- if (!target_has_execution)
+ if (!target_has_execution ())
{
long phdrs_size;
int num_phdrs, i;
static int
linux_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range)
{
- struct linux_info *info = get_linux_inferior_data ();
+ struct linux_info *info = get_linux_inferior_data (current_inferior ());
if (info->vsyscall_range_p == 0)
{
"mmap" uses 64-bit off_t on x86_64 and 32-bit off_t on i386 and x32. */
struct value *mmap_val = find_function_in_inferior ("mmap64", &objf);
struct value *addr_val;
- struct gdbarch *gdbarch = get_objfile_arch (objf);
+ struct gdbarch *gdbarch = objf->arch ();
CORE_ADDR retval;
enum
{
struct objfile *objf;
struct value *munmap_val = find_function_in_inferior ("munmap", &objf);
struct value *retval_val;
- struct gdbarch *gdbarch = get_objfile_arch (objf);
+ struct gdbarch *gdbarch = objf->arch ();
LONGEST retval;
enum
{
/* See linux-tdep.h. */
+displaced_step_prepare_status
+linux_displaced_step_prepare (gdbarch *arch, thread_info *thread,
+ CORE_ADDR &displaced_pc)
+{
+ linux_info *per_inferior = get_linux_inferior_data (thread->inf);
+
+ if (!per_inferior->disp_step_bufs.has_value ())
+ {
+ /* Figure out the location of the buffers. They are contiguous, starting
+ at DISP_STEP_BUF_ADDR. They are all of size BUF_LEN. */
+ CORE_ADDR disp_step_buf_addr
+ = linux_displaced_step_location (thread->inf->gdbarch);
+ int buf_len = gdbarch_max_insn_length (arch);
+
+ linux_gdbarch_data *gdbarch_data = get_linux_gdbarch_data (arch);
+ gdb_assert (gdbarch_data->num_disp_step_buffers > 0);
+
+ std::vector<CORE_ADDR> buffers;
+ for (int i = 0; i < gdbarch_data->num_disp_step_buffers; i++)
+ buffers.push_back (disp_step_buf_addr + i * buf_len);
+
+ per_inferior->disp_step_bufs.emplace (buffers);
+ }
+
+ return per_inferior->disp_step_bufs->prepare (thread, displaced_pc);
+}
+
+/* See linux-tdep.h. */
+
+displaced_step_finish_status
+linux_displaced_step_finish (gdbarch *arch, thread_info *thread, gdb_signal sig)
+{
+ linux_info *per_inferior = get_linux_inferior_data (thread->inf);
+
+ gdb_assert (per_inferior->disp_step_bufs.has_value ());
+
+ return per_inferior->disp_step_bufs->finish (arch, thread, sig);
+}
+
+/* See linux-tdep.h. */
+
+const displaced_step_copy_insn_closure *
+linux_displaced_step_copy_insn_closure_by_addr (inferior *inf, CORE_ADDR addr)
+{
+ linux_info *per_inferior = linux_inferior_data.get (inf);
+
+ if (per_inferior == nullptr
+ || !per_inferior->disp_step_bufs.has_value ())
+ return nullptr;
+
+ return per_inferior->disp_step_bufs->copy_insn_closure_by_addr (addr);
+}
+
+/* See linux-tdep.h. */
+
+void
+linux_displaced_step_restore_all_in_ptid (inferior *parent_inf, ptid_t ptid)
+{
+ linux_info *per_inferior = linux_inferior_data.get (parent_inf);
+
+ if (per_inferior == nullptr
+ || !per_inferior->disp_step_bufs.has_value ())
+ return;
+
+ per_inferior->disp_step_bufs->restore_in_ptid (ptid);
+}
+
+/* See linux-tdep.h. */
+
CORE_ADDR
linux_get_hwcap (struct target_ops *target)
{
}
/* To be called from the various GDB_OSABI_LINUX handlers for the
- various GNU/Linux architectures and machine types. */
+ various GNU/Linux architectures and machine types.
+
+ NUM_DISP_STEP_BUFFERS is the number of displaced step buffers to use. If 0,
+ displaced stepping is not supported. */
void
-linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch,
+ int num_disp_step_buffers)
{
+ if (num_disp_step_buffers > 0)
+ {
+ linux_gdbarch_data *gdbarch_data = get_linux_gdbarch_data (gdbarch);
+ gdbarch_data->num_disp_step_buffers = num_disp_step_buffers;
+
+ set_gdbarch_displaced_step_prepare (gdbarch,
+ linux_displaced_step_prepare);
+ set_gdbarch_displaced_step_finish (gdbarch, linux_displaced_step_finish);
+ set_gdbarch_displaced_step_copy_insn_closure_by_addr
+ (gdbarch, linux_displaced_step_copy_insn_closure_by_addr);
+ set_gdbarch_displaced_step_restore_all_in_ptid
+ (gdbarch, linux_displaced_step_restore_all_in_ptid);
+ }
+
set_gdbarch_core_pid_to_str (gdbarch, linux_core_pid_to_str);
set_gdbarch_info_proc (gdbarch, linux_info_proc);
set_gdbarch_core_info_proc (gdbarch, linux_core_info_proc);
set_gdbarch_core_xfer_siginfo (gdbarch, linux_core_xfer_siginfo);
+ set_gdbarch_read_core_file_mappings (gdbarch, linux_read_core_file_mappings);
set_gdbarch_find_memory_regions (gdbarch, linux_find_memory_regions);
set_gdbarch_make_corefile_notes (gdbarch, linux_make_corefile_notes);
set_gdbarch_has_shared_address_space (gdbarch,
set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
}
+void _initialize_linux_tdep ();
void
-_initialize_linux_tdep (void)
+_initialize_linux_tdep ()
{
linux_gdbarch_data_handle =
- gdbarch_data_register_post_init (init_linux_gdbarch_data);
+ gdbarch_data_register_pre_init (init_linux_gdbarch_data);
/* Observers used to invalidate the cache when needed. */
gdb::observers::inferior_exit.attach (invalidate_linux_cache_inf);
gdb::observers::inferior_appeared.attach (invalidate_linux_cache_inf);
+ gdb::observers::inferior_execd.attach (invalidate_linux_cache_inf);
add_setshow_boolean_cmd ("use-coredump-filter", class_files,
&use_coredump_filter, _("\
projects / binutils-gdb.git / blobdiff